I usually just take out my front condenser blower, and the battery is easier to remove and install. I still prefer the huge battery, a glass mat battery from interstate. It is the exact same battery that I put iin my wife's 2017 Macan. Only in the Macan I had to use my OBD2 computer to tell the car the serial number, part number, amp house and if it is a AGM or wet cell battery. In my 911, I only had to rest the clock for a few minutes the battery was disconnected.
On one road trip, I went down to my car in the evening and turned on the dome light on the passenger side and left it on overnight by mistake. The battery did not miss a blink. On one trip to Arkansas, my alternator went to full charge, and I noticed as I was unpacking a funny smell, and the battery was HOT. A small battery would have exploded. I filled it up with more water, and drove with the AC, heater, fresh air fans, headlights and fog lights on and even the rear window defogger and outside mirror heaters on. I had that alternator rebuilt, and I had a voltage meter installed in the tach. Now I know what the voltage the alternator is making.
